JPH0293456A - Magazine for photographic sensitive material - Google Patents

Abstract

PURPOSE:To enhance the destaticization effect at the time of high-speed photographing and high-speed housing and to prevent the generation of static marks and attraction of dust to the photosensitive material by sticking a cloth having a specific piles to a magazine. CONSTITUTION:The cloth having piles consisting of composite fibers formed by joining conductive components 101 and static electricity control components 102 is used for light shielding members 5a, 5b in a film inlet/outlet part 3 of the magazine. The components 101 are formed of conductive particles, for example, conductive carbon black and thermoplastic synthetic polymer (e.g. 'Nylon 66(R)') and the components 102 are formed of the static electricity con trol agent (A) and fiber forming polymer, more preferably 'Nylon 66(R)'. The reaction product of the alkylene oxide addition product of glycerol and/or trimethylol propane and alkyl dicarboxylate is preferably used for the static electricity control agent A.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a magazine for photographic light-sensitive materials, and more specifically, to a photographic light-sensitive material magazine having an improved light-shielding member having a pile attached to a drawer portion of a magazine body for photographic light-sensitive materials. Regarding magazines for materials.

[Prior Art] Currently, photographic materials are used in various magazines for photographic materials so that they can be handled in bright places except for the steps of exposure and development. The most commonly known magazine for photographic materials is the cartridge for 135 size film.

As shown in FIG. 3, this 135 size film cartridge has one end attached to the shaft of a spool shaft 1, and a film 2 wound into a cylindrical shape with the emulsion side facing inside.
The other end is exposed to the outside from the film entrance/exit section 3. The magazine outer cylinder 4 of this cartridge has a cylindrical shape made of plastic or metal plate, and the film entrance/exit part 3 is formed by the mating portions of both ends thereof. This magazine outer cylinder 4
A light shielding member 5a is provided at the film entrance/exit portion 3 to prevent light from entering inside.

5b is attached, and the film 2 loaded into the camera is pulled out and photographed. When the photographing is completed, the film 2 is rewound into the film cartridge and taken out from the camera for development processing.

Another type of magazine for photographic materials is a film cartridge, which is published in Japanese Patent Application Laid-Open No. 62-235946,
It is also used in wide-width photographic materials such as those described in Japanese Patent Application Laid-open No. 62-23040, Japanese Utility Model Application Publication No. 62-57255, and Japanese Patent Application Publication No. 60-156058. Figure 4 shows a typical example.

In FIG. 4, the package main body 21 consists of an inner body 22 and an outer body 23 that encloses the inner body 22. and,
A support member 25 capable of supporting both ends of the winding tube 24 of the film 2
．． 26, and these support members 25 and 26 are rotatably supported by laminated cardboard and punched into a disc shape, but there is no need to limit the material, and the pull-out load of the film 2 The package body 21 has an outlet 2 for the film 2, which may be fixed as long as it is not unnecessarily large.
7 is provided, and this outlet 27 is provided with a light shielding means 28. As this light shielding means 28, passage forming members 29a and 29b for passing the film 2 through the inner surface of the outlet 27.
are installed facing each other, and light shielding cloths 30a and 30b are attached to the opposing surfaces of the passage forming members 29a and 29b to prevent outside light from entering. The passage forming members 29a, 29
It is preferable for b to be constructed in an oblique shape as shown in the figure from the viewpoint of light shielding, and the passage forming members 29a and 29b are reinforced so as not to be deformed depending on the working method. The leading edge of the film 2 is normally seen through the outlet 27 and is ready for exposure.

The film openings and exits of these magazines for photosensitive materials are designed to: ■ prevent light from entering the magazine, ■ make it easy to take in and take out photosensitive materials, and ■ prevent scratches on the back surface when taking in and out of photosensitive materials. To do this, a light shielding member with piles is attached.

[Problems to be Solved by the Invention] As described above, magazines for photographic light-sensitive materials usually have a light shielding member attached to the film entrance/exit portion to prevent light from entering the inside of the magazine body from the film entrance/exit portion. This light-shielding member must not only prevent the film from being exposed to light but also facilitate the film's unwinding and rewinding operations, and is therefore made of a flexible material such as pile fabric.

In addition, recent camera trends include high-speed automatic winding,
Currently, the main focus is on rewind cameras.

With the spread of these cameras, when the camera is operated, static electricity is generated due to contact between the film and the light-shielding member attached to the entrance/exit of the magazine for photosensitive materials, and when this discharges, only the discharged part becomes exposed to light, and the development process is delayed. Depending on the condition, various types of contamination may appear, such as dendritic, cloud-like, and cotton-like shapes. Hereinafter, these contaminated areas will be referred to as static marks.

In order to improve problems caused by static electricity charging and discharging, Japanese Patent Publication No. 62-40696 discloses conductive fibers in which a cotton-like polymer containing an inorganic conductive substance is dispersed in a fiber-forming polymer in the form of streaks. Also, Jitsukō 46-28218
The publication discloses the use of conductive fibers in which a conductive film is formed on the surface of chemical fibers.

However, there is a problem in that the charge voltage cannot be reduced to 0.3 KV or less even if the entire pile is made of conductive 1a fibers only by the neutralizing effect of the corona discharge of the conductive fibers.

On the other hand, in order to reduce the electrostatic charge caused by contact with the light shielding member at the film entrance and exit, the film used should be
The film is treated with antistatic treatment, an antistatic layer is provided on the back side of the film, and its slipperiness is improved.

However, recent films are I S O1000,
Those with extremely high sensitivity, such as LS O1600 and 15O3200, and those with even higher quality are being sought.

Furthermore, polyester film bases, which tend to generate static electricity, have come to be used to improve mechanical strength and dimensional stability. At present, it is impossible to prevent static marks from occurring when taking high-speed photographs using a camera.

This invention was made in view of this point, and the effect of corona discharge from the conductive component and the effect of the charge attenuation effect of the antistatic component are complementary when photographing and storing photographic materials at high speed. The object of the present invention is to provide a magazine for photographic materials that exhibits an excellent static elimination effect and can prevent the generation of static marks and the adsorption of dust.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the magazine for photographic light-sensitive materials of the present invention includes a magazine body made of conductive particles and a thermoplastic synthetic polymer, at least in the drawer portion for the photographic light-sensitive materials of the magazine body. The present invention is characterized in that a fabric having a pile including a composite fiber in which a conductive component and an antistatic component made of a fiber-forming polymer containing an antistatic agent are bonded is provided as a light shielding member.

The composite t11a used in the present invention is a composite fiber in which a conductive component made of conductive particles and a thermoplastic synthetic polymer and an antistatic polymer component are bonded together.

As the conductive particles, conductive carbon black as described in Japanese Patent Application No. 63-29825, particles of conductive metal oxides or metal compounds, or particles having a film thereof on the surface are preferable. The particle size is usually 2 μm or less, and preferably 0.5 μm or less in order to prevent damage to the photosensitive material.

Preferred examples of the thermoplastic synthetic polymer include polyolefins such as polyethylene, polypropylene, vinyl chloride, and polystyrene, polyamides such as nylon 6, nylon 66, and nylon 12, and polyesters such as polyethylene terephthalate and polybutylene terephthalate. More preferred are polymers of

In the case of carbon black, the amount of conductive particles in the conductive component is usually 10 to 45% by weight, preferably 15 to 40% by weight.
In the case of metal oxides and metal compounds, it is usually 30 to 85% by weight, preferably 50 to 80% by weight.

If the amount is too small, the conductivity will be insufficient, while if the amount is too large, the moldability and physical properties will deteriorate.

In the composite fiber, the conductive component usually has an electrical resistivity of 10'Ωcm or less, preferably 100m or less, and more preferably 1°00m or less.

The antistatic agent used in this invention may be any known antistatic agent having wood-philicity or surface activity, such as that described in the Practical Handbook of Additives for Plastics and Rubber, published by Kagaku Kogyosha in 1972. Examples include alkyl ether ester types, alkyl amine types, phosphate ester types, and alkyl ether types.

In addition, as an antistatic component, ia mixed with an antistatic agent is used.
Any antistatic polymer used in known antistatic synthetic fibers such as fiber-forming polymers or fiber-forming polymers copolymerized with antistatic agents may be used, and usually has an electrical resistivity of 107 to 1.
010 Ωem. The amount of antistatic agent is usually 1~
It may be 61% by weight, more preferably 1.5 to 4% by weight. Note that ordinary fiber-forming polymers that are not noteworthy antistatic polymer components have an electrical resistivity of 10'1 Ωcm.
Therefore, it is difficult to achieve the object of the present invention. In addition, in the polymer or copolymerization of the electrophilic polymer component, the main component of the constituent fibers is the same as the thermoplastic polymer of the conductive component, or It is preferable to select a combination that does not peel off.

The bonding form of the conductive component and antistatic component of the composite fiber used in this invention (for example, core-sheath type, the center may be a conductive component and the surrounding area may be an antistatic component, or vice versa) Although not particularly limited, the bonding area ratio of the conductive component is usually 15% or less, and 1 to 10% is a preferable range for obtaining good thread quality and conductivity. Also,
In order to prevent damage to the film when taking out and unwinding the film, it is preferable that the conductive component is not exposed on the side of the fibers.On the other hand, in order to generate corona discharge at a location away from the film, it is preferable that the conductive component is not exposed on the side of the fiber. An exposed form is preferable; to satisfy this conflict, a form in which the fiber side surface is exposed in as small a proportion as possible, for example, 10% or less, preferably 5% or less, or intermittently exposed in a narrow width. It is preferable that
In view of the resolution required for the film, it is more preferable that the exposed width be 2 μm or less, and it is advantageous for the joining form in the cross section of the fibers to have rotational symmetry in terms of yarn production.

The conjugate fiber used in the present invention can be produced by a known method in which the fibers are spun using a melt conjugate spinning device equipped with a plurality of melt extruders and a spinneret for splicing and discharging a plurality of polymers, and then drawn. When the antistatic agent is press-injected into the melt of the iaMI-forming polymer, it is preferable to mix it uniformly using a known kneading element such as a static mixer, and then spin it. When used, for example, the fibers are converged into tows of 300,000 to 1,000,000 deniers, crimped by a stuffing method, heat set, and cut to obtain short fibers, and then spun yarns or blended yarns are produced by known methods. On the other hand, when using filament yarn, the mixing rate of composite fibers will be high if it is used as it is. Furthermore, a method of blending a spun mixed yarn and a normal mixed yarn is advantageous. When a multifilament yarn is used as a pile yarn, if it is mixed with at least one composite fiber, it is good for the purpose of imparting electrostatic properties, and it is usually inserted every few yarns. Even when using spun yarn, there is a method in which at least one composite fiber is mixed into each spun yarn, or a composite yarn is mixed at an average rate of one or less in the longitudinal direction of the pile yarn. A method may be selected as appropriate, such as a method in which only spun yarns that are present (intermittently present) are used as pile yarns.

When manufacturing a light-shielding cloth using the yarn produced by the above method, please refer to Utility Model Publication No. 61-34526 and Japanese Patent Application Publication No. 53-10522.
No. 2 and Japanese Patent Application No. 60-282630.

It is preferable that the composite fibers of the present invention exist uniformly throughout the light-shielding cloth.

In the light-shielding cloth of the present invention, by using the pile yarn, a sufficient static elimination effect can be obtained with a smaller amount of 0.1% by weight or more. When filament yarns are used as pile yarns, there is no generation of fiber dust caused by cutting the pile, which is advantageous when using short fibers. Further, in multi-woven knitted fabrics, it is advantageous to use composite fibers for the face yarns.

The method of attaching the light shielding member used in this invention to the metal magazine body is disclosed in Japanese Patent Application Laid-open Nos. 49-96049 and 5
No. 3-105219, No. 53-105220, No. 53
-105221, 54-4932, JP-A-61-
No. 233738, JP-A-62-27733, JP-A No. 61-
The method described in No. 210347 can be used. In the case of magazines other than metal magazines, they can be attached using any known adhesive method such as a solvent type adhesive or double-sided adhesive tape. These light shielding members may be attached not only to the film entrance/exit portion of the magazine but also to the entire interior of the magazine.

In the photographic material magazine of the present invention, metals forming the magazine body include, for example, steel, zinc, aluminum, copper, and alloys thereof.

In addition, the surfaces of these metals are treated using methods such as phosphate coating, iron oxide coating, chromate coating, chromic acid oxide coating, and chromate diphosphate coating. You may be

Further, when the magazine body is formed of paper, cardboard or the like is used. Furthermore, the surface of the metal is
No. 0-26061, No. 60-26062, No. 60-2
Specific examples of paints, inks, etc. that may be coated with paints, inks, etc. described in No. 6063, Japanese Patent Application No. 60-75207, etc. include alkyd resin-based, amino-alkyd resin-based, vinyl resin-based, acrylic resin. paints such as epoxy resins, polyurethane resins, polyester resins, various rust-reducing paints, water-based paints, cellulose derivatives, etc.
Examples include ink. Also, JP-A-60-26061
They can also be used in combination as described in No. 60-26062, No. 60-26053, etc.

In the light shielding member used in the present invention, a filler can be used to prevent the pile from falling off the base fabric and to prevent the adhesive from penetrating into the pile portion.

The filler used in this invention includes, for example, JP-A-60-118472, JP-A-62-27733, JP-A-60-211372, and JP-A-60-195635.
Resins such as those described in No. 1, etc. can be used.

In the present invention, adhesives used for pasting the light shielding member having the pile and the magazine body include those described in JP-A No. 61-289347, polyolefins such as polyethylene, ethylene-vinyl acetate copolymers, etc. Vinyl acetate copolymer system, ethylene-ethyl acrylate,
Acrylic acid ester copolymer systems such as ethylene-isobutyl acrylate, polyamide systems such as nylon 6, nylon 66, nylon 10, nylon 12, N-methoxymethylated nylon, polyester systems such as terephthalic acid systems,
Cellulose derivatives such as polyvinyl butyral, polyvinyl acetate, acetate, methyl cellulose, acetate butyrate, polymethacrylic esters such as polymethyl methacrylate, polyvinyl ethers such as polyvinyl methyl ether, polyurethane, polycarbonate, styrene. Styrenic block copolymer systems such as ethylene-butylene-styrene, styrene-butadiene,
1f selected from synthetic rubbers such as isoprene and butylgoku, special rubbers not included in these, acrylic copolymers not included above, etc. Or a mixture of two or more types can be mentioned. In the case of paper cartridges, commonly sold double-sided adhesive tape may be used.

[Examples] Examples of this invention are shown below. Of course, this invention includes:
The invention is not limited to this example.

Example-1 A magazine for photographic material was prepared under the following conditions.

Yarn preparation (pile yarn) Nylon 66 containing 35% by weight of conductive carbon black
2. A reaction product of the conductive component 101 consisting of 2. A fixed amount of O3i was injected into the nylon 66 melt using a gear pump, and the antistatic component 102 was uniformly mixed using a static mixer with 20 elements.The mixture was then spun at 285° C. and 700 m/min using melt composite spinning. bonding form, the bonding area ratio of the conductive component is 9%),
Then, it was hot drawn at 3.25 times to produce a 72 denier/24 filament composite fiber. This composite fiber is 3.9
The yarn had a strong elongation of g/d of 43% and a hot water shrinkage rate of 11%, and the electrical resistivity of the conductive component was 2.4×10 Ωcm.

Note that the reference numeral 101 shown in FIG. 1 is an antistatic component, and 10
2 may be configured in the opposite manner to the conductive component.

Next, this composite fiber was made into a 1M1a stable with a length of 51 mm, mixed with a nylon stable with a single yarn fineness of 3d and a fiber length of 51 mm, and spun to 60/2.

Thread for base fabric Regular rayon thread 150D736F Weaving method Base fabric Plain weave Pile V-shaped hook has pile length 1.4mm Base fabric density Warp 54 wood/cm Weft
20 wood/cm Number of piles: 50 wood/cm Number of piles: 20/cm Sealing resin ethylene vinyl acetate type ^-2350 Nylon type manufactured by Daicel Chemical Industries, Ltd. FS-350 Mixed product manufactured by Teikoku Chemical Co., Ltd. Resin coating amount 40g/rr? Adhesive Olefin type 97500 Manufactured by Hirodyne Industries Co., Ltd. Coating thickness 70μ The above material was used to adhere to a 135 film size cartridge, and a film was placed inside to prepare a sample. Note that the film used is a high-sensitivity film.

Sample Comparison 8 uses yarn made using the same method as in the present invention, with the antistatic agent removed.

Test conditions: Camera used: Nikon F71; Tardrive film feed speed: 6 frames/second; Temperature and humidity conditions: 20°C/20% RH;
The film was developed and visually judged for the presence or absence of static marks.

Judgment criteria: ×...Occurrence is clearly recognized within the screen○...
・No static marks were observed.As can be seen from the above results, the composite fiber blend ratio was 0.
．． At 3% by weight or more, it is effective in preventing static marks.
The effect is almost saturated at 1% by weight or more.

In addition, using the same method as this invention, base fabric yarn (120 denier 4
0 filament) and used this at the same time when making the light-shielding cloth of this invention, but the effect did not improve further.

In addition, the sealing resins used are acrylic resin W-6008 manufactured by Diabond Industries Co., Ltd. Acrylic/styrene resin GD-11 Styrene/butadiene resin LX-415 manufactured by Kanebo NSC Co., Ltd. Nippon Zeon Co., Ltd. In addition, we used adhesives such as olefin-based Crumpeter X-1430 Kurashiki Boseki Co., Ltd. polyurethane-based Elfan UH203 Nippon Matai Co., Ltd. family Elfan uH204 Nippon Matai Co., Ltd. polyamide-based Elfan NT100 Nippon Matai Co., Ltd. family Elfan TN120 Made by Nippon Matai Co., Ltd. Polyester SP-170 Made by Nippon Gosei Kagaku Co., Ltd. LP-011 Made by Nippon Gosei Kagaku Co., Ltd. PES-120 A similar test was conducted by changing to the product made by Toagosei Kagaku Kogyo Co., Ltd. , no change in effectiveness was observed.

Example-2 A magazine for photographic material was prepared under the following conditions.

Preparing the thread (using filament thread 100D152F)
In the same manner as in Example 1, undrawn composite fibers of 65 denier and 6 filaments were prevented (however, 2 filaments were in the bonding form shown in FIG. 2, and the remaining 4 filaments were spun mixed yarns consisting of an antistatic component).

In addition, also in FIG. 2, the reference numeral 101 may be an antistatic component and 102 may be the conductive component.

Next, 260 obtained by melt spinning ordinary nylon 66
The undrawn yarn of 36 denier filaments was combined and drawn, and then entangled with air to produce a mixed fiber yarn of conjugate fibers of 100 denier 42 filaments.

This mixed fiber yarn was used as a pile yarn at various batting intervals to create a velvet fabric using ordinary nylon 66 100 denier 48 filaments as the remaining pile yarn and rayon 120 denier 40 filaments as the ground yarn.

Weaving method Base fabric twill weave Pile V-shaped hook has pile length 1.8mm Base fabric density Warp 76 wood/cm Weft 40
Wood/cm Number of piles: 38 Wood/cm Pile Number of piles: 20 Wood/cm Sealing resin Acrylic resin/Ethylene vinyl acetate resin 8X-2433 manufactured by Daicel Chemical Industries, Ltd. Coating amount: 40
g/rd Adhesive Olefin type #7500 80S Manufactured by Hirodyne Industries Co., Ltd. Coating thickness 60μ The above material was used to adhere to a 135 film size cartridge, and a film was placed inside to prepare a sample. Note that the film used was 15O3200 film.

The pile yarn of the comparison sample was made in exactly the same way as the yarn of the present invention, except that the antistatic agent was omitted.

Test condition The conditions are the same as in Example-1.

Result 066%/c rr? ? Mixing monopolymer fibers shows the effect, and mixing any more than this results in no difference.

Example-3 Using the light-shielding cloth used in Example-2, the surface of the light-shielding cloth was brought into frictional contact with the film (load: 100 g/crn' speed: 10 m/min), and the amount of charge on the light-shielding cloth was measured.

Measuring device: Surface electrometer made by Ando Denki Temperature and humidity conditions = 23°C, 720% PH As shown in the table above, by using the pile yarn of the present invention, it is possible to reduce the amount of charge on the light-shielding cloth, and it is possible to reduce the charge amount to 0.
．． Above 66%, the difference disappears.

[Effects of the Invention] Since the magazine for photographic light-sensitive materials of the present invention is constructed as described above, it has the following effects. When photographing and storing photosensitive materials at high speed, the effect of corona discharge from conductive components and the antistatic component! The effect of the charge attenuation effect is complemented with the effect of providing an excellent charge removal effect, and it is possible to prevent the generation of static marks and the adsorption of dust. In addition, since the conductive component is protected by an antistatic component, the yarn quality is better and more stable than conventional fibers coated with carbon black-containing polymers or fibers that prevent mixing of carbon black-containing polymers. , and can be handled in the same way as regular fibers.

[Brief explanation of the drawing]

Figure 's1 is a diagram showing the joining form of the light shielding means of the magazine for photographic light-sensitive materials of the present invention, FIG. 2 is a diagram showing the joining form of the light shielding means of the magazine for photographic light-sensitive materials showing another embodiment, and FIG. 4 is a cross-sectional view of the film cartridge, and FIG. 4 is a cross-sectional view of the film cartridge.

Claims (1)

[Scope of Claims] 1. At least the drawer portion of the magazine body for photographic light-sensitive materials is provided with an antistatic component made of a conductive component made of conductive particles and a thermoplastic synthetic polymer, and a fiber-forming polymer containing an antistatic agent. A magazine for photographic materials, which is provided with a fabric having piles containing composite fibers bonded to a conjugate fiber as a light-shielding member. 2. The magazine for photographic materials according to claim 1, wherein the conductive particles are conductive carbon black. 3. Thermoplastic synthetic polymers are nylon 6 and nylon 12.
2. The magazine for photographic materials according to claim 1, which is polyethylene terephthalate, polyethylene, polypropylene, or modified products thereof. 4. The magazine for photographic materials according to claim 1, wherein the hydrophilic compound is a reaction product of an alkylene oxide adduct of glycerin and/or trimethylolpropane and an alkyl dicarboxylic acid ester. 5.Claim 1, wherein the fiber-forming polymer is nylon 66.
Magazine for photosensitive materials listed.